Hello all,

My gf and I recently purchased our first LS powered vehicle. Its a 94 Camaro which was originally a V6, its now powered by a 2002 LQ4 6.0L backed up by a T56. Starts and runs, currently some fuel plumbing issues and wiring issues holding back its full potential.

A pic and some specs.



LQ4, stock internals, heads ported.
LS1 intake, 36LB/HR injectors.
GMPP Hot Cam, LS6 valve springs.
Z06 clutch and flywheel.

Now onto issues, which is the main reason I started this membership and why I usually do not buy others projects. It stumbles pretty hard when first taking off from idle. It has aftermarket fuel rails, an Aeromotive FPR, and AN lines run from the rails all the way to the tank. The return line to the tank is just slid onto a barb fitting on the FPR, no clamp or fitting! ekk! Also the vacuum reference is not connected to the intake.

Next is the wiring. From what the PO told me, he removed all the wiring in the car and re-wired everything. Its evident that he may have bit off a bit more than he can chew. Headlights don't turn on, cooling fans are wired to a switch, and the fuel pumps (yes pumpS) run constantly with the key on. Now I do have a bit of wiring experience seeing as I converted my 86 C10 to TPI, but this is just scary. Lots of electrical tape. I'm afraid of finding twisted together wires under some of the tape. I'm thinking I would be better off finding an entire car harness for a 98-02 LS1 car, but what are the odds of that for under 1000.

Well all in all the price was still right for the car, and the seller even threw in subframe connectors and another set of 97+ 5 spokes. I plan on teaching my gf so maybe I can sit back on this one (yea right!).

 

Nice find man. I'd imagine the electrical issue could fix the stumbling. I'd start there. You could probably find some parting out F-Bodies on Craigslist to take the harness from, but I'm not sure how that would translate to the dash and IP cluster. Your car is originally wired to OBD-I, the LQ4 is an OBD-II engine. Also note worthy is the LQ4 is a Gen 3 LSx motor. that means the computer management system needs to be from a Gen 3 LSx vehicle. The Gen 4 wont work. Good Luck, hopefully others here can be more help.

 

Well thankfully I found the PO's username on here, so it gives me more insight into what exactly was done to the car. The wiring was replaced with a harness from a 97 Firebird V6, and the engine harness was pinned to the ECU as a 2000 Camaro. Doesn't help me figure out what every random wire is for...

The ECU is from a 2002 Silverado, and apparently has a basemap loaded. I hope its good enough to get it to a shop.

 

Thanks for your help hrcslam. Ideally I would like to find a complete body and engine harness for a 98-02 Camaro, then I would just have to re-pin the parts that don't match (dash cluster, etc.) easy enough.

I've created a thread in the Camaro section to document progress.

https://ls1tech.com/forums/chevrolet...l#post16926451